Brain temperature reductions (1-3 C) were induced by
intranasal cooling. Purpose of this study was to compare MRSI with high
spatial and reduced spectral resolution and phase-difference technique that
were used in monitoring the brain temperature changes during cooling. Both
methods were sensitive to the slight involuntary movement (rotation) of the
head. Random (reversible) and systematic (irreversible) movement artifacts
were observed. Measurements in the transversal slices were more robust to the
movement artifacts than those in sagittal planes.